## Reflection: Adjustments to Practice Theorems about Diagonals of Parallelograms - Section 3: Activity

After teaching this lesson to my morning class, I realized some students still needed extra help writing the proofs. I typed up a worksheet for the later classes, which guided students who needed the extra scaffolds. These students answered questions

Adjustments to Practice: Sometimes additional scaffolding is necessary

# Theorems about Diagonals of Parallelograms

Unit 9: Proofs about Parallelograms
Lesson 8 of 10

## Big Idea: Students use prior knowledge to write formal proofs about the diagonals of a parallelogram.

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Standards:
Subject(s):
Math, Geometry, Proofs, parallelogram, logic, quadrilaterals, reasoning and proof, properties of polgygons
45 minutes

### Marisa Laks

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